stamp computers running on 3.3 V supply?
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Does parallax has plans to make basicstamps that run on CMOS
processors requiring 3.3 Volts only. Is that a big jump from the
current basic stamp product lineup? Has anyone got experience with or
aware of stamp computers ( or single board computers)that have
similar capability as basic stamps (not fancy high power single
boards) but run on 3.3 Volts? Thanks .
Mohammed
processors requiring 3.3 Volts only. Is that a big jump from the
current basic stamp product lineup? Has anyone got experience with or
aware of stamp computers ( or single board computers)that have
similar capability as basic stamps (not fancy high power single
boards) but run on 3.3 Volts? Thanks .
Mohammed
Comments
>Does parallax has plans to make basicstamps that run on CMOS
>processors requiring 3.3 Volts only. Is that a big jump from the
>current basic stamp product lineup? Has anyone got experience with or
>aware of stamp computers ( or single board computers)that have
>similar capability as basic stamps (not fancy high power single
>boards) but run on 3.3 Volts? Thanks .
>Mohammed
I'm surprised someone isn't using a small cascade style voltage
multiplier to drive JUST the Stamp in a situation where 5V is not
available. I know in the past parallax used a 16Cxx as the core
processor in the basic Stamp. Some of the 16Cxx processors are
designed to operate at 2V or less. I am not sure what low voltage
Chip options are available with the current Stamp processor.
-Beau Schwabe
>processors requiring 3.3 Volts only. Is that a big jump from the
>current basic stamp product lineup? Has anyone got experience with or
>aware of stamp computers ( or single board computers)that have
>similar capability as basic stamps (not fancy high power single
>boards) but run on 3.3 Volts? Thanks .
>Mohammed
The original BS1 chip can be run at 4mhz on a 2.7 to 6 volt supply,
provided you leave off the reset chip or provide one that resets at
<~2.7 volts.
The original BS2 uses an external reset chip, however, the PIC16C57HS
is only good at 20mhz between 4.5 and 5.5 volts.
The SX based Stamps use the reset circuit that is built into the
chip, configured for a 5 volt supply, but the chip itself could
operate at lower voltages, down to 2.7 volts with proper choice of
the reset. I doubt if Parallax would want to muddy the waters
though, by tinkering with it.
-- Tracy
Does anyone from Parallax has any comment on my question?
--- In basicstamps@yahoogroups.com, Tracy Allen <tracy@e...> wrote:
> >Does parallax has plans to make basicstamps that run on CMOS
> >processors requiring 3.3 Volts only. Is that a big jump from the
> >current basic stamp product lineup? Has anyone got experience with
or
> >aware of stamp computers ( or single board computers)that have
> >similar capability as basic stamps (not fancy high power single
> >boards) but run on 3.3 Volts? Thanks .
> >Mohammed
>
> The original BS1 chip can be run at 4mhz on a 2.7 to 6 volt supply,
> provided you leave off the reset chip or provide one that resets at
> <~2.7 volts.
>
> The original BS2 uses an external reset chip, however, the
PIC16C57HS
> is only good at 20mhz between 4.5 and 5.5 volts.
>
> The SX based Stamps use the reset circuit that is built into the
> chip, configured for a 5 volt supply, but the chip itself could
> operate at lower voltages, down to 2.7 volts with proper choice of
> the reset. I doubt if Parallax would want to muddy the waters
> though, by tinkering with it.
>
> -- Tracy
Thanks to everyone for their responses on this topic.
I checked with Parallax Engineering and here is the response to your
3.3v question:
We have considered producing a Stamp-type device that runs on 3.3 volts.
Silicon fabrication processes are becoming smaller and smaller all the
time, resulting in more microcontrollers that require a maximum of 3.3
volts, so it is very likely that we will move this direction as well.
It is uncertain about just when this will happen, however, because we
are still in the developing stages. There is certainly no product
offerings we have right now that fit your requests.
Erik Wood
ewood@p...
Parallax, Inc.
599 Menlo Dr., Suite #100
Rocklin, CA 95765
(916) 624-8003 Fax
(888) 512-1024 Sales
www.parallax.com
Original Message
From: mohammedrasiq [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=kcvDumnpgrYGexyBSJhxOXGcHYPNKzed6TfLVMXggyeLb5Yxsq66Mpnty8OWAIn9JIkhY_FosrAkeTqUhqFWkF0]mohammedrasiq@y...[/url
Sent: Thursday, August 21, 2003 7:57 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: stamp computers running on 3.3 V supply?
Thanks Tracy and Beau for your replies.
Does anyone from Parallax has any comment on my question?
--- In basicstamps@yahoogroups.com, Tracy Allen <tracy@e...> wrote:
> >Does parallax has plans to make basicstamps that run on CMOS
> >processors requiring 3.3 Volts only. Is that a big jump from the
> >current basic stamp product lineup? Has anyone got experience with
or
> >aware of stamp computers ( or single board computers)that have
> >similar capability as basic stamps (not fancy high power single
> >boards) but run on 3.3 Volts? Thanks .
> >Mohammed
>
> The original BS1 chip can be run at 4mhz on a 2.7 to 6 volt supply,
> provided you leave off the reset chip or provide one that resets at
> <~2.7 volts.
>
> The original BS2 uses an external reset chip, however, the
PIC16C57HS
> is only good at 20mhz between 4.5 and 5.5 volts.
>
> The SX based Stamps use the reset circuit that is built into the
> chip, configured for a 5 volt supply, but the chip itself could
> operate at lower voltages, down to 2.7 volts with proper choice of
> the reset. I doubt if Parallax would want to muddy the waters
> though, by tinkering with it.
>
> -- Tracy
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mohammedrasiq@y... writes:
Thanks Tracy and Beau for your replies.
Does anyone from Parallax has any comment on my question?
You may want to consider a different uP. The SX sold by Parallax (not BS2SX)
can be run at 3.3 volts. HOWEVER, this chip is not nearly as easy to program
as the basic stamps.
http://www.parallax.com/sx/index.asp
This SX has some big advantages over the Basic Stamps, and some disadvantages.
Advantages:
cost - $10 including resonator
speed - much faster. Your basic BS2 can wait for the status of an input pin
in a loop, and take about 500 to 800 uS, where the SX does the same thing in 60
nS, yes, nanoseconds.
Disadvantages:
Compared to PBasic, programming the SX is much harder, but even a dummy like
me learned how to do it when the speed of the Basic Stamps would not meet my
requirements.
Smaller circle of users, so the internet support forum is smaller.
Every thing is written in assembly. For example with the basic stamp you have
cool commands like SHIFTOUT. To do the same with the SX is a nightmare by
comparison (but I got it working after about 4 hours!)
Ken
[noparse][[/noparse]Non-text portions of this message have been removed]